| Title |
Research Paper - Solidification - : 3 - Dimensional Analysis on the Spray Forming Mechanism of Billet |
| Authors |
여동훈(Dong Hoon Yeo); 석현광(Hyun Kwang Seok); 오규환(Kyu Hwan Oh); 이호인(Ho In Lee); 나형용(Hyung Yong Ra) |
| Abstract |
A 3-dimensional mathematical model to simulate spray forming of billet has been developed. The effect of processing parameters such as spray density constants a and b, substrate angular velocity ω, substrate withdrawal velocity V, eccentric distance l_e and spray angle Φ on the spray forming billet has been studied. The asymmetrical shape was obtained at the low value of substrate angular velocity. The parameters V, l_e, a, b and Φ were found to have no effect on the symmetry of billet. And the necessary condition to reach the steady state of billet growth is as follows : V < a*·(d_0/(d_0-l_e/sinΦ))·cosΦ where d_0 is initial spray distance and a* is spray constant a at spray distance d_0. |